The ones I kinda like are, Bakaara, Dome occasionally, Arkaden, Resistance, Lockdown, Fallen, Underground, Mission and Interchange since I use Type 95. Basically all the maps that make it feel like MW2.

ACR is easier to aim with + way higher range proficiency I think RG will like the MP7 and ACR. PP90M1 is my favorite gun, but it´s relatively hard to control, compared to the other guns in the game, and it´s highly inaccurate from a distance (especially, with rapid fire on).